FKIE_CVE-2026-64353

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-25 10:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Keep dynamic inner array lookups nullable An ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its inner map template. A concrete inner array with a different max_entries value can then replace the template. After a successful outer map lookup, the verifier represents the resulting map pointer using the inner map template. Const-key lookup nullness elision consequently uses the template max_entries even though the runtime helper uses the concrete inner map max_entries. Do not elide lookup result nullness for maps marked with BPF_F_INNER_MAP, because the template max_entries does not prove that the key is in bounds for the concrete runtime map.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d57db0d975053e01410c54e708a85b6d32ef2ebd
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0b92ad64d6e4bde85e6b9888404f9a7a2b65d269",
              "status": "affected",
              "version": "d2102f2f5d75a84dbab6ff890359f0bd4a18ca22",
              "versionType": "git"
            },
            {
              "lessThan": "d57db0d975053e01410c54e708a85b6d32ef2ebd",
              "status": "affected",
              "version": "d2102f2f5d75a84dbab6ff890359f0bd4a18ca22",
              "versionType": "git"
            },
            {
              "lessThan": "53040a81ae57cdca8af8ac36fe4e661730cf7c6b",
              "status": "affected",
              "version": "d2102f2f5d75a84dbab6ff890359f0bd4a18ca22",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Keep dynamic inner array lookups nullable\n\nAn ARRAY_OF_MAPS can use an array created with BPF_F_INNER_MAP as its\ninner map template. A concrete inner array with a different max_entries\nvalue can then replace the template.\n\nAfter a successful outer map lookup, the verifier represents the\nresulting map pointer using the inner map template. Const-key lookup\nnullness elision consequently uses the template max_entries even though\nthe runtime helper uses the concrete inner map max_entries.\n\nDo not elide lookup result nullness for maps marked with BPF_F_INNER_MAP,\nbecause the template max_entries does not prove that the key is in bounds\nfor the concrete runtime map."
    }
  ],
  "id": "CVE-2026-64353",
  "lastModified": "2026-07-25T10:17:17.700",
  "metrics": {},
  "published": "2026-07-25T10:17:17.700",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0b92ad64d6e4bde85e6b9888404f9a7a2b65d269"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/53040a81ae57cdca8af8ac36fe4e661730cf7c6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d57db0d975053e01410c54e708a85b6d32ef2ebd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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